NEUTRAL DENSITY FILTER VS POLARIZER : FILTER VS POLARIZER


NEUTRAL DENSITY FILTER VS POLARIZER : SPAM FILTER FOR MICROSOFT EXCHANGE : 2 WIRE DSL FILTER.



Neutral Density Filter Vs Polarizer





neutral density filter vs polarizer






    neutral density
  • In photography and optics, a neutral density filter or ND filter can be a colorless (clear) or grey filter. An ideal neutral density filter reduces and/or modifies intensity of all wavelengths or colors of light equally, giving no changes in hue of color rendition.

  • Colorless filters that reduce the amount of light in controlled degrees. (Camera/Lighting)

  • Represents a measure of how dark the color is. The lightest possible value corresponds to a neutral density of 0.0 and is equivalent to pure white; while the value 3.294 is roughly equivalent to the sum of 100% of each of the CMYK inks and can be interpreted as Registration Color.





    polarizer
  • A light filter which only allows light waves of a certain rotation through. Polarized material with perpendicular filtering is used in LCDs to enclose the liquid crystal.

  • A stretched polymer which transmits light in only one axis. A typical display has polarizers on the front and back.

  • A polarizer is a device that converts a beam of electromagnetic waves (light) of undefined or mixed polarization into a beam with well-defined polarization. The common types of polarizers are linear polarizers and circular polarizers.





    filter
  • A device for suppressing electrical or sound waves of frequencies not required

  • an electrical device that alters the frequency spectrum of signals passing through it

  • A screen, plate, or layer of a substance that absorbs light or other radiation or selectively absorbs some of its components

  • remove by passing through a filter; "filter out the impurities"

  • A porous device for removing impurities or solid particles from a liquid or gas passed through it

  • device that removes something from whatever passes through it











neutral density filter vs polarizer - Cokin BP400A77




Cokin BP400A77 P Series 77mm Filter Holder with 77mm Adapter Ring


Cokin BP400A77 P Series 77mm Filter Holder with 77mm Adapter Ring



The Cokin Creative Filter System consists of a rectangular plastic filter holder with four slots (one for Cokin rotating filters and three for rectangular ones), a variety of optional adapter rings which click into place and rotate, and many optical resin filters. The "P" series covers diameters from 48-82mm, and is generally preferred for everything, particularly wide-angle lenses. Over 100 filters and a wide range of accessories are available for each system, i.e. modular lens hoods, lens caps, and storage boxes. The Cokin P Filter-Holder is the ideal Cokin Filter-Holder to avoid vignetting on APS and full frame lenses for digital cameras. Up to three filters can be used to create a unique effect. A 77mm lens adapter ring included.










76% (10)





Polariser vs GND filter




Polariser vs GND filter





Otago Peninsula & Oamaru, South Island, NZ

Both the photos on the left are taken with a circular polariser, while the photos on the right are taken using a graduated neutral density filter.

As you can hopefully see, the polariser cuts back the glare on the water and makes the clouds stand out more in a blue sky, but the colours seem better using the gndfilter (this may just be personal preference) and the sky is not so flat. I have left all these photos as they were taken in the camera, both using f11, ISO100, standard contrast and high saturation.

Just thought it might be interesting for people to see the difference, as most only really use one or the other :) Also, I get a lot of questions as to why I prefer to use a gnd filter rather than the more popular polariser - this may help explain why (or not!)











Neutral Density Nature




Neutral Density Nature





Having fun with my Neutral Density Filter. Ah, to have a mountain stream with lapping water and snow capped peaks in the background....

Still, I do love this little dam and it's almost Friday!









neutral density filter vs polarizer








neutral density filter vs polarizer




Singh-Ray Vari-N-Duo Polarizing Variable ND Filter






The Vari-N-Duo Polarizing Variable Neutral Density Filter adds a polarizer to our popular Vari-ND, offering photographers the same extra-long exposure effects, with the added convenience of a built-in circular polarizer to control glare, improve color saturation, and make white clouds "pop" in blues skies. Use it to turn a waterfall or stream into a cloud of mist, or calm the surface of a lake or ocean. The density of the Vari-N-Duo can be easily changed from its minimum density of approximately 2-2/3 f-stops to 8 f-stops by simply rotating its outer ring. For example, a sunlit waterfall might meter at f/8 at 1/500 -- adding the Vari-N-Duo can let you shoot as slow as 1/2 second at f/8 and still maintain the same exposure while making the flowing water appear to be soft and silky mist. To pan your shot of a speeding car or a duck landing on water, the Vari-N-Duo easily slows your shutter speed to achieve a more dramatic and “moving” background image. Or use “selective focus” to emphasize your main subject, open your lens to its widest aperture in order to minimize depth-of-field, focus, and then dial the Vari-N-Duo to the density needed to correctly expose your image. Since the Vari-N-Duo covers densities from 2-2/3 to 8 f-stops, it replaces multiple solid neutral density filters and possibly even your old polarizer, saving money, time and space in your bag. Instead of framing and focusing your image through a dark conventional solid ND filter, simplly focus and frame with the Vari-ND set at its minimum density, then rotate the outer ring to the desired density. And while moving objects will be blurred, the Vari-ND maintains sharp optical resolution in the scene’s non-moving areas, provided the camera is on a firm tripod. Available in 77mm Standard ring mount. Due to its profile thickness, this filter may cause vignetting on some wide-angle lenses, especially with full frame sensor cameras. See our site for availability and pricing details.










See also:

car stereo noise filter

types of sand filters

deep bed sand filter

cook gunther tulip ivc filter

hoya 58mm circular polarizing filter

business internet filter

heating oil filter

iron filter



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